Not affect your 姐姐 green card application,

來源: 於 2015-04-25 17:39:20 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

but your 妹妹 may have big trouble if she overstays in US (she can not get the green card within US unless she marry a US citizen).